2101312133 has 2 divisors, whose sum is σ = 2101312134. Its totient is φ = 2101312132.

The previous prime is 2101312127. The next prime is 2101312151. The reversal of 2101312133 is 3312131012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1637254369 + 464057764 = 40463^2 + 21542^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101312133 - 2¹⁸ = 2101049989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101312193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050656066 + 1050656067.

It is an arithmetic number, because the mean of its divisors is an integer number (1050656067).

Almost surely, 2^2101312133 is an apocalyptic number.

It is an amenable number.

2101312133 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101312133 is an equidigital number, since it uses as much as digits as its factorization.

2101312133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2101312133 is about 45840.0712586706. The cubic root of 2101312133 is about 1280.8458221844.

Adding to 2101312133 its reverse (3312131012), we get a palindrome (5413443145).

The spelling of 2101312133 in words is "two billion, one hundred one million, three hundred twelve thousand, one hundred thirty-three".